A test device for endoscope passive bending section fatigue and a method of using the same

Abstract

The application discloses a kind of endoscope passive bending part fatigue test device and its use method, wherein endoscope passive bending part fatigue test device includes pedestal, first connecting column, mounting block, support component, dialing component and detection component;The handle of the pedestal one end is provided with rotating avoidance site for installing endoscope, first connecting column can slide along the length direction of pedestal, the one end of mounting block is rotatably connected with first connecting column, mounting block slides with connecting column, when connecting column slides to rotating avoidance site, mounting block can rotate around first connecting column, support component is arranged on mounting block, support component supports the insertion tube of endoscope, dialing component is arranged on the other end of mounting block, dialing component dials passive bending part of insertion tube, and detection component detects passive bending part of insertion tube.

Description

Technical Field

[0001] This invention relates to the field of endoscopy, and in particular to a testing device for fatigue of the passive bending portion of an endoscope and its method of use. Background Technology

[0002] Endoscopes have passively bent insertion tubes. To prevent them from breaking due to overuse and puncturing the sheath, which could expose the wires inside the surgical cavity and cause injury, the passively bent section of the endoscope needs to be fatigue-tested before leaving the factory or before use. Currently, there is no device or method for testing the fatigue strength of the passively bent section of the endoscope under various bending conditions that occur in the surgical cavity. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a testing device for the fatigue of the passive bending portion of an endoscope. During fatigue testing, the device simulates the bending state and usage of a real endoscope in the cavity of a surgical subject as closely as possible, thereby enabling more accurate testing of the fatigue strength of the passive bending portion of the endoscope.

[0004] The present invention also proposes a method for using a testing device for fatigue of the passive bending section of an endoscope.

[0005] According to a first aspect of the present invention, a testing device for fatigue testing of the passive bending portion of an endoscope includes: a base, a first connecting post, a mounting block, a support assembly, a toggle assembly, and a detection assembly; one end of the base is provided with a rotation clearance position, and the base is used to mount a handle of the endoscope; the first connecting post is slidably connected to the base; one end of the mounting block is rotatably connected to the first connecting post, the mounting block is slidably connected to the base, and the mounting block can slide with the first connecting post; when the first connecting post slides to the rotation clearance position, the mounting block can rotate around the first connecting post; the support assembly is disposed on the mounting block, and the support assembly is used to support an insertion tube; the toggle assembly is disposed at the other end of the mounting block, and the toggle assembly is used to toggle the passively bent portion of the insertion tube; the detection assembly is used to detect the number of bends of the passively bent portion and to observe the passively bent portion.

[0006] According to an embodiment of the present invention, a testing device for fatigue of the passive bending portion of an endoscope has at least the following beneficial effects: The mounting block and the first connecting post are both slidably connected to the base, and the mounting block can slide synchronously in the same direction as the first connecting post. When the first connecting post slides to the rotation avoidance position, the mounting block can rotate around the first connecting post, thus forming a certain angle between the mounting block and the base. This simulates the bending of the insertion tube when inserted into the cavity to be tested, providing a more realistic insertion environment simulation. The supporting component is used to support the insertion tube and prevent it from being subjected to its own stress. The passive bending is affected by gravity, thus affecting the subsequent bending and detection of the passively bent portion. The set actuation component can simulate the bending conditions of the passively bent portion. The first driving component in the actuation component drives the passively bent portion to bend passively, simulating the normal movement of the passively bent portion of the endoscope in the cavity of the surgical object. The second driving component in the actuation component drives the passively bent portion to reciprocate, simulating the situation of the endoscope entering and leaving the cavity of the surgical object. With the cooperation of the rotatable mounting block, a more realistic bending simulation of the passively bent portion in the cavity to be tested can be achieved, so that the detection component can obtain more stable and reliable data, thereby completing the fatigue test of the passively bent portion.

[0007] According to some embodiments of the present invention, the support assembly is slidably connected to the mounting block. The support assembly includes a plurality of support blocks, and each support block is provided with a slot for engaging the insertion tube. The plurality of support blocks can provide a plurality of fulcrums, thereby providing more stable support for the insertion tube and reducing the influence of the insertion tube's own weight.

[0008] According to some embodiments of the present invention, the actuating assembly includes: a slider slidably disposed on the mounting block; a first driving member disposed on the slider; a bracket connected to the output end of the first driving member, the bracket being used to support the passively bent portion of the insertion tube; a second driving member disposed on the slider, the output end of the second driving member being connected to the slider, the second driving member being used to drive the slider to reciprocate; the first driving member drives the bracket to rotate, thereby actuating the passively bent portion. The actuating assembly has a simple structure. The first driving member drives the bracket to rotate, thereby driving the passively bent portion to bend and twist. The second driving member drives the slider to reciprocate, thereby adjusting the bending amplitude of the passively bent portion. The combination of the two movements can achieve a more realistic simulation of the bending of the passively bent portion.

[0009] According to some embodiments of the present invention, the first driving component is a motor, and the second driving component is a telescopic cylinder. The telescopic cylinder is used to drive the slider to reciprocate, thereby adjusting the degree of bending of the passively bent part. The motor and the telescopic cylinder are widely available and easy to purchase and install.

[0010] According to some embodiments of the present invention, the bracket includes: a second connecting post, one end of which is connected to the rotating shaft of the motor; a connecting sleeve, which is detachably connected to the other end of the second connecting post; and an angle support block, which is hinged to the connecting sleeve. The angle support block is used to support the passively bent portion of the insertion tube. The bracket has a simple structure, and the detachable connecting sleeve facilitates the replacement of angle support blocks of different specifications.

[0011] According to some embodiments of the present invention, the connecting sleeve is slidably fitted onto the other end of the second connecting post, and a spring is provided on the second connecting post, one end of the spring being connected to the second connecting post and the other end of the spring being connected to the connecting sleeve. The spring is used to provide elastic damping, which can simulate the state of a passively bent portion hitting an obstacle when the connecting sleeve is compressed.

[0012] According to some embodiments of the present invention, the angle support block is provided with a contour groove, which is used to support the passively bent portion of the insertion tube. The contour groove is long enough to cover the passively bent portion of the insertion tube, which facilitates the installation of the passively bent portion of the insertion tube. The contour groove is used to install the passively bent portion, so that the passively bent portion can have more contact area with the contour groove, ensuring the stable installation of the passively bent portion and preventing the passively bent portion from shaking in the contour groove.

[0013] According to some embodiments of the present invention, the detection component includes: a bracket; a first detector, the first detector being a proximity switch, the detection head of the proximity switch facing the angle support block, the proximity switch being used to detect the number of rotations of the angle support block; and a second detector, the second detector including three cameras, the cameras being mounted on the bracket, the cameras being used to capture images of the passively bent portion, recording data and images simultaneously and comparing them to make the detection results more accurate.

[0014] According to some embodiments of the present invention, the bracket includes an arc portion and a support portion, the arc portion being connected to the support portion, and three cameras being respectively disposed at the trisection points of the base circle where the arc portion is located. The cameras are used to capture the passively bent portion. The cameras at the trisection points can capture a more comprehensive view, making the capture results more accurate and convenient for comparison. The proximity switch is low in cost, readily available, and easy to use.

[0015] A method of using an endoscope passive bending section fatigue testing device according to a second aspect embodiment of the present invention, applied to the endoscope passive bending section fatigue testing device, the method of use includes the following steps:

[0016] To install, pull the mounting block along the length of the base to the rotation clearance position, rotate the mounting block so that the mounting block and the base form a predetermined angle, place the handle of the endoscope on the base, embed the insertion tube into the support block, and make the passively bent part of the insertion tube of the endoscope fit against the angle support block.

[0017] In the bending simulation, the motor and the telescopic cylinder are started. The motor shaft begins to rotate, the angle support block moves the passively bent part, and the telescopic cylinder begins to drive the slider to reciprocate, so that the passively bent part is bent or stretched.

[0018] Test: Activate the first detector and the second detector, adjust the first detector to align it with the angle support block, and adjust the camera to align it with the bend of the passively bent part.

[0019] The method of using a testing device for passive bending fatigue of an endoscope according to an embodiment of the present invention has at least the following advantages: The method is convenient and easy to operate. Both the mounting block and the first connecting column are slidably connected to the base, and the mounting block can slide synchronously in the same direction as the first connecting column. When the first connecting column slides to the rotation avoidance position, the mounting block can rotate around the first connecting column, thus forming a certain angle between the mounting block and the base. This simulates the bending of the insertion tube when inserted into the cavity to be tested, providing a more realistic insertion environment simulation. The supporting component is used to support the insertion tube and prevent it from being subjected to... The passively bent portion bends due to its own gravity, thus affecting subsequent bending and detection of the passively bent portion. The actuating component can simulate the bending conditions of the passively bent portion. The first driving member in the actuating component drives the passively bent portion to bend passively, simulating the normal movement of the passively bent portion of the endoscope in the cavity of the surgical object. The second driving member in the actuating component drives the passively bent portion to reciprocate, simulating the entry and exit of the endoscope into the cavity of the surgical object. With the help of the rotatable mounting block, a more realistic bending simulation of the passively bent portion in the cavity under test is achieved, enabling the detection component to obtain more stable and reliable data, thereby completing the fatigue test of the passively bent portion.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1This is a schematic diagram of the endoscope passive bending fatigue testing device according to an embodiment of the present invention.

[0023] Figure 2 This is a top view of the endoscope passive bending fatigue testing device according to an embodiment of the present invention.

[0024] Figure 3 for Figure 1 A schematic diagram of the actuation assembly of the endoscope passive bending section fatigue testing device is shown.

[0025] Figure 4 for Figure 1 A schematic diagram of the detection component of the endoscope passive bending fatigue testing device is shown.

[0026] Figure 5 for Figure 1 A schematic diagram of the bracket of the endoscope passive bending section fatigue testing device is shown.

[0027] Figure 6 A graph showing the relationship between time and displacement during the operation of a telescopic cylinder;

[0028] Figure 7 This is a graph showing the relationship between the operating time and rotation angle of the motor.

[0029] Base 100, rotation clearance 110, slide 120;

[0030] Fixing block 130, fixing groove 131, first connecting post 200;

[0031] Mounting block 300, support component 400, support block 410, and slot 411;

[0032] Toggle assembly 500, slider 510, first drive component 520;

[0033] Bracket 530, second connecting post 531, spring 531a;

[0034] Connecting sleeve 532, angle support block 533;

[0035] Contouring groove 533a, cover 533b, second drive component 540;

[0036] Detection component 600, first detector 610;

[0037] Second detector 620, camera 621, bracket 630;

[0038] Arc portion 631, locking block 631a, support portion 632;

[0039] Insertion tube 700, passive bending part 710, handle 800. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0042] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0043] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0044] Reference Figures 1 to 7 A testing device for fatigue of the passive bending portion of an endoscope includes: a base 100, a first connecting post 200, a mounting block 300, a support assembly 400, a toggle assembly 500, and a detection assembly 600; one end of the base 100 is provided with a rotation clearance position 110, and the base 100 is used to mount the handle 800 of the endoscope; the first connecting post 200 is slidably connected to the base 100; one end of the mounting block 300 is rotatably connected to the first connecting post 200, and the mounting block 300 is slidably connected to the base 100. The 0 can slide with the first connecting post 200. When the first connecting post 200 slides to the rotation clearance position 110, the mounting block 300 can rotate around the first connecting post 200. The support component 400 is disposed on the mounting block 300 and is used to support the insertion tube 700. The actuating component 500 is disposed at the other end of the mounting block 300 and is used to actuate the passively bent portion 710 of the insertion tube 700. The detection component 600 is used to detect the number of bends of the passively bent portion 710 and to observe the passively bent portion 710.

[0045] Reference Figure 2 The mounting block 300 and the first connecting post 200 are both slidably connected to the base 100. The mounting block 300 can slide synchronously in the same direction as the first connecting post 200. When the first connecting post 200 slides to the rotation clearance position 110, the mounting block 300 can rotate around the first connecting post 200. This allows the mounting block 300 to form a certain angle with the base 100, thereby simulating the bending of the insertion tube 700 when inserted into the cavity to be tested, giving the insertion tube 700 a more realistic insertion environment simulation. The support component 400 is used to support the insertion tube 700 and prevent the insertion tube 700 from bending due to its own weight, thus affecting the subsequent passive bending part 710. The bending and detection are performed by a toggle assembly 500, which can simulate the bending conditions of the passive bending section 710. The first drive member 520 in the toggle assembly 500 drives the passive bending section 710 to bend passively, simulating the normal movement of the passive bending section 710 of the endoscope in the cavity of the surgical object. The second drive member 540 in the toggle assembly 500 drives the passive bending section 710 to reciprocate, simulating the entry and exit of the endoscope into the cavity of the surgical object. With the help of the rotatable mounting block 300, a more realistic bending simulation of the passive bending section in the cavity under test is achieved, so that the detection assembly 600 can obtain more stable and reliable data, thereby completing the fatigue test of the passive bending section. It is understandable that the mounting block 300 does not need to be pulled to the rotation clearance position 110. In this way, the length of the mounting block 300 and the base 100 extends in the same direction, which can accommodate insertion tubes 700 of different lengths to meet the usage requirements. The base 100 is provided with a sliding groove 120, which extends along the length of the base 100, and the first connecting post 200 can slide along the sliding groove.

[0046] In some embodiments, the base 100 further includes a fixing block 130, which is provided with a fixing groove 131 for fixing the endoscope handle 800. The first connecting post 200 facilitates the rotation of the mounting block 300. The base 100 is provided with length and angle scales for easy adjustment and accurate simulation. The mounting block 300 can be pulled out along the length direction of the base 100 to a predetermined position and forms a predetermined angle with the base 100. The endoscope handle 800 is placed on the base 100, and the insertion tube 700 is embedded into the support block 410 so that the passively bent part fits against the angle support block. 533; Start the motor and telescopic cylinder. The motor shaft begins to rotate. The angle support block 533 moves the passively bent part 710. The telescopic cylinder begins to drive the slider 510 to reciprocate. Start the first detector 610 and the second detector 620. Adjust the first detector 610 to align it with the angle support block 533. Adjust the camera 621 to align it with the bend of the passively bent part 710. Start the detection component 600, the motor and the telescopic cylinder. The moving component 500 begins to move the passively bent part 710 of the insertion tube to ensure that all the bending times of the passively bent part 710 of the insertion tube are recorded.

[0047] In some embodiments, the support assembly 400 is slidably connected to the mounting block 300. The support assembly 400 includes a plurality of support blocks 410, each of which has a slot 411 for engaging the insertion tube 700. The plurality of support blocks 410 can provide a plurality of fulcrums, which can more stably support the insertion tube 700 and reduce the influence of the insertion tube 700 on its own weight. The plurality of support blocks 410 facilitates fixing the insertion tube 700. Adjusting the distance between the plurality of support blocks 410 can stably fix the insertion tube 700 and prevent the insertion tube from sag due to gravity. It is understood that the support assembly 400 can also be a first cylinder. The main shaft of the first cylinder is provided with a slot 411. The main shaft of the first cylinder can be adjusted in height to accommodate different types of insertion tubes 700.

[0048] Reference Figure 3The actuating assembly 500 includes: a slider 510 slidably mounted on the mounting block 300; a first drive member 520 mounted on the slider 510; a bracket 530 connected to the output end of the first drive member 520, the bracket 530 supporting the passively bent portion 710 of the insertion tube; and a second drive member 540 mounted on the slider 510, the output end of the second drive member 540 connected to the slider 510, the second drive member 540 driving the slider 510 to slide. The first drive member 520 drives the bracket 530 to rotate, thereby actuating the passively bent portion 710. The actuating assembly 500 has a simple structure. The first drive member 520 drives the bracket 530 to rotate, thereby driving the passively bent portion 710 to bend and twist. The second drive member 540 drives the slider 510 to slide, thereby adjusting the bending amplitude of the passively bent portion 710. The combination of the two movements can achieve a more realistic simulation of the bending of the passively bent portion 710.

[0049] In some embodiments, the first drive member 520 is configured as a motor, and the second drive member 540 is configured as a telescopic cylinder. The telescopic cylinder is used to drive the slider 510 to slide, thereby adjusting the degree of bending of the passively bent part 710. The motor and the telescopic cylinder are widely available and easy to purchase and install. It is understood that the motor can be configured as a stepper motor, servo motor or hydraulic motor or other power element that can provide torque, and the telescopic cylinder can be configured as a linear motor or hydraulic cylinder or other power element that can provide linear force.

[0050] Reference Figure 5 The bracket 530 includes: a second connecting post 531, one end of which is connected to the rotating shaft of the motor; a connecting sleeve 532, which is detachably connected to the other end of the second connecting post 531; and an angle support block 533, which is hinged to the connecting sleeve 532. The angle support block 533 is used to support the passively bent portion 710 of the insertion tube. The bracket 530 has a simple structure and the detachable connecting sleeve facilitates the replacement of angle support blocks 533 of different specifications. It is understood that the angle support block 533 is provided with an adjustable cover 533b, thereby completely covering the passively bent portion 710 of the insertion tube. It is understood that one side of the cover 533b is circumferentially hinged to the angle support block 533, and the other side is detachably connected to the cover 533b.

[0051] In some embodiments, the connecting sleeve 532 is slidably sleeved on the other end of the second connecting post 531. A spring 531a is provided on the second connecting post 531. One end of the spring 531a is connected to the second connecting post 531, and the other end of the spring 531a is connected to the connecting sleeve 532. The spring 531a is used to provide elastic damping. When the connecting sleeve 532 is compressed, it can simulate the state of the passively bent part 710 touching an obstacle. It is understood that the spring 531a can be set as a spring sheet, a coil spring, or a rubber component with elasticity.

[0052] In some embodiments, the angle support block 533 is provided with a contour groove 533a, which is used to support the passively bent portion 710 of the insertion tube. The contour groove 533a is long enough to cover the passively bent portion 710 to facilitate its installation. The contour groove 533a is used to install the passively bent portion 710, so that the passively bent portion 710 can have more contact area with the contour groove 533a, ensuring the stable installation of the passively bent portion 710 and preventing the passively bent portion 710 from shaking in the contour groove 533a. It is conceivable that the contour groove 533a is set according to the shape of the passively bent portion 710 of the insertion tube to facilitate the installation of the passively bent portion 710 of the insertion tube.

[0053] Reference Figure 4 The detection components include: a bracket 630; a first detector 610, which is a proximity switch with its detection head facing the angle support block 533, and the proximity switch is used to detect the number of rotations of the angle support block 533; and a second detector 620, which includes three cameras 621 mounted on the bracket 630. The cameras 621 are used to capture images of the passively bent portion 710, recording data and images simultaneously for comparison, thus making the detection results more accurate. It is conceivable that the first detector 610 can also be set as a common CCD industrial camera or a photoelectric beam counter, and the cameras 621 can be set as a microscope camera to make the collected images clearer.

[0054] In some embodiments, the bracket 630 includes an arc portion 631 and a support portion 632. The arc portion 631 is connected to the support portion 632. Three cameras 621 are respectively set at the trisection points of the base circle where the arc portion 631 is located. The cameras 621 are used to capture the passively bent portion 710. The cameras 621 at the trisection points can capture a more comprehensive view, making the results more accurate and convenient for comparison. The proximity switches are low-cost, readily available, and easy to use. It is understood that the arc portion 631 is provided with a locking block 631a, which is set one-to-one with the camera. The locking block 631a is used to install the camera 621. That is to say, the microscopic cameras set at the trisection points of the base circle can achieve the effect of collecting fatigue images of the passively bent portion of the insertion tube from all directions. The collected images are compared with preset images, and the fatigue test is stopped immediately when an abnormality is found.

[0055] A method of using a testing device for fatigue testing of the passive bending portion of an endoscope includes the following steps: Installation: Pulling the mounting block 300 along the length of the base 100 to a predetermined position, forming a predetermined angle with the base 100; placing the endoscope handle 800 on the base 100; embedding the insertion tube 700 into the support block 410, so that the passive bending portion 710 fits against the angle support block 533; Bending simulation: Starting the motor and telescopic cylinder, the motor shaft begins to rotate, the angle support block 533 moves the passive bending portion 710, and the telescopic cylinder begins to drive the slider 510 to reciprocate; Monitoring test: Starting the first detector 610 and the second detector 620, adjusting the first detector... 610, align it with the angle support block 533, adjust the camera 621, align it with the bend of the passively bent part 710; it can be understood that in the installation steps, the endoscope is placed horizontally and the plane on which the angle adjustment handle swings is basically parallel to the horizontal plane. During the parallel adjustment process, the object is adjusted and judged to ensure that it is placed horizontally. Specifically, a level is used to judge during adjustment, and the plane on which the angle adjustment handle swings is basically parallel to the horizontal plane is sufficient; during the fixing process, the insertion tube 700 is fixed to the support block 410 along the tip direction. During the fixing process, the support component 400 can be slid to prevent the insertion tube 700 from curving downwards locally. The arc's central angle does not exceed 300°, while simultaneously fixing the operating part to the fixing block 130 and ensuring the passively bent part 710 is just exposed on the outside of the support block 410 closest to the motor. The angle between the base 100 and the mounting block 300 is α, -30°≤α≤60° (α is denoted as 0° when both are on a straight line), to simulate the bending state of the insertion tube 700 during operation. Additionally, adjusting the distance between the slider 510 and the tip allows the snake-like portion of the exposed support block 410 to be placed into the contour groove 533a, with the cover naturally covering the snake-like portion, while ensuring the passively bent part is positioned between the motor and the... The nearest support block 410 is located between the motor side and the contour groove 533a, and locks the slider 510 and the telescopic cylinder that drives the slider 510 to reciprocate. The reciprocating distance of the telescopic cylinder is within 0-120mm, for example, 0.05mm or 119mm. During the monitoring test, the second detector 620 collects the status image of the passively bent part 710 in real time, performs image detection on the collected images, and classifies the damage of abnormal areas in the image detection to form a comparison image. When one of the cameras of the second detector 620 detects damage to the passively bent part 710, the counting of the first detector 610 and the working status of the motor and telescopic cylinder are paused.

[0056] After the insertion part enters the cavity, its insertion and rotation movements are often performed in tandem, as shown in the reference. Figure 6 and Figure 7To simulate the movement of the insertion section within the cavity, the curved section in this device is compressed by the reciprocating motion of a telescopic cylinder, and bent by the rotation of a motor. Among these, Figure 6 This indicates the time-displacement state of the slider 510 driven by the telescopic cylinder as it slides over time. Figure 7 Indicates in relation to Figure 6 The relationship between the rotational speed and direction of the motor driving the angle support block 533 during the same time period is as follows: Phase A indicates that the slider 510 moves slowly in one direction to the predetermined position and then stops moving. During this phase, the angle support block 533 maintains its original state. During this phase, the bending part often does not deform when the insertion part is inserted. This phase is mainly for preliminary position exploration. Phase B indicates that the slider 510 maintains its original displacement position, and the angle support block 533 undergoes one forward and reverse rotation and swings at a certain angle. During this phase, after the insertion part finds the position to be observed, the bending part begins to bend, driving the lens on the tip to observe at that position. Phase C indicates that the angle support block 533 does not rotate and continuously acquires an image at a certain angle, while the insertion part advances or retracts to achieve an alternating process and finally stops at a suitable position. This is to observe a certain part and continuously acquire an image of that part, requiring the insertion part to be pushed forward or pulled out to obtain a full view image in that direction. Phase D indicates that the insertion part stops being pushed in, and the angle support block 533 slowly changes its angle and achieves a swinging motion. Phase E indicates that the angle remains unchanged, and the insertion part slowly extends or retracts to achieve a reciprocating motion. Phase F indicates that the angle changes once, and the insertion part does not advance or retract and remains in its original position. The above AF phases are just examples to illustrate that the telescopic motion and angle change occur in combination, and are not a set of standard fixed actions. In actual practice, the order is not limited, and any combination of the above phases may be used, and the state of each phase is not limited to the illustrated method.

[0057] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A testing device for fatigue of the passive bending section of an endoscope, characterized in that, include: The base (100) has a rotation clearance position (110) at one end, and the base (100) is used to install the handle (800) of the endoscope. The first connecting post (200) is slidably connected to the base (100); Mounting block (300), one end of which is rotatably connected to the first connecting post (200), the mounting block (300) is slidably connected to the base (100), the mounting block (300) can slide with the first connecting post (200), and when the first connecting post (200) slides to the rotation clearance position (110), the mounting block (300) can rotate around the first connecting post (200); A support assembly (400) is disposed on the mounting block (300). The support assembly (400) is used to support the insertion tube (700). The support assembly (400) includes a plurality of support blocks (410). The support blocks (410) are slidably connected to the mounting block (300). The support blocks (410) are provided with slots (411) for engaging the insertion tube (700). A toggle assembly (500) is disposed at the other end of the mounting block (300), the toggle assembly (500) being used to toggle the passively bent portion (710) of the insertion tube (700). A detection component (600) is used to detect the number of bends of the passively bent portion (710) and to observe the passively bent portion (710). The detection component (600) includes a bracket (630), a first detector (610), and a second detector (620). The first detector (610) is a proximity switch. The second detector (620) includes three cameras (621) mounted on the bracket (630) for capturing images of the passively bent portion (710).

2. The testing device for fatigue of the passive bending section of an endoscope according to claim 1, characterized in that, The toggle assembly (500) includes: A slider (510) is slidably disposed on the mounting block (300); A first driving element (520) is disposed on the slider (510); A bracket (530) is connected to the output end of the first drive member (520), and the bracket (530) is used to support the passively bent portion (710) of the insertion tube. A second driving member (540) is disposed on the slider (510). The output end of the second driving member (540) is connected to the slider (510). The second driving member (540) is used to drive the slider (510) to reciprocate. The first driving member (520) drives the bracket (530) to rotate, thereby actuating the passively bent portion (710).

3. The testing device for fatigue of the passive bending section of an endoscope according to claim 2, characterized in that, The first driving component (520) is a motor, and the second driving component (540) is a telescopic cylinder. The telescopic cylinder is used to drive the slider (510) to slide back and forth, thereby adjusting the degree of bending of the passively bent part (710).

4. The testing device for fatigue of the passive bending section of an endoscope according to claim 3, characterized in that, The bracket (530) includes: The second connecting post (531) is connected at one end to the rotating shaft of the motor; The connecting sleeve (532) is detachably connected to the other end of the second connecting post (531); An angle support block (533) is hinged to the connecting sleeve (532), and the angle support block (533) is used to support the passively bent portion (710) of the insertion tube.

5. The endoscope passive bending section fatigue testing device according to claim 4, characterized in that, The connecting sleeve (532) is slidably fitted onto the other end of the second connecting post (531). A spring (531a) is provided on the second connecting post (531), one end of which is connected to the second connecting post (531), and the other end of which is connected to the connecting sleeve (532).

6. A testing device for fatigue of the passive bending portion of an endoscope according to claim 4 or 5, characterized in that, The angle support block (533) is provided with a contour groove (533a), which is used to support the passively bent part (710).

7. The testing device for fatigue of the passive bending section of an endoscope according to claim 6, characterized in that, The bracket (630) includes an arc portion (631) and a support portion (632). The arc portion (631) is connected to the support portion (632), and the three cameras (621) are respectively set at the three equal division points of the base circle where the arc portion (631) is located.

8. A method of using a testing device for fatigue of the passive bending section of an endoscope, characterized in that, The testing device for fatigue testing of the passive bending portion of the endoscope as described in claim 7, the method of use includes the following steps: To install, pull the mounting block (300) along the length of the base (100) to the rotation clearance position (110), rotate the mounting block (300) so that the mounting block (300) and the base (100) form a predetermined angle, place the endoscope handle (800) on the base (100), insert the insertion tube (700) into the support block (410), and make the passively bent part (710) of the endoscope insertion tube fit against the angle support block (533). In the bending simulation, the motor and the telescopic cylinder are started. The motor shaft begins to rotate. The angle support block (533) moves the passive bending part (710). The telescopic cylinder begins to drive the slider (510) to reciprocate, so that the passive bending part (710) is bent or stretched. Test: Activate the first detector (610) and the second detector (620), adjust the first detector (610) to align it with the angle support block (533), and adjust the camera (621) to align it with the bend of the passively bent part (710).

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